Paper bag



March 13, 1934. T. s. FALK 1,951,011

- PAPER BAG Filed Sept. 18. 1929 2 Sheets-Sheet 1 a INVENTOR Theodare 5.("Z/A1 ATTORNEY? March 13, 1934. T. s FALK 1,951,011

P APER BAG Filed Sept. 1811929 2 Sheets-Sheet 2 1 22 INVENTOR TheodoreJ. fa/A.

A TTORNE Y5 Patented Mar. 13, 1934 UNITED STATES 1,951,011 I PAPER BAGTheodore S. Falk, Brooklyn, N. Y., assignor to Continental Paper and BagCorporation, New

York, N. Y., a corpor ation of Delaware Application September is, 1929,Serial No. 393,354

9 Claims.

It is a further object of the invention to provide a method of makingsuch bags which will,

enable the bags to be made on the same machines as are now employed forthe making of square bags of the satchel type.

Other objects and advantages will hereinafter appear. 1

In the drawings forming part of this specification:

Figure 1 is a fragmentary, side view of a pa- I per tube from which thebag blanks are formed;

Figure 2 is a side view of a single bag blank with a portion folded backto reveal certain details of structure;

. Figure 3 is a view similar to Figure 2, but showing the bag blank at amore advanced stage in the process of manufacture;

Figure 4 shows the same bag blank a step nearer completion; I

Figure 54s a view similar to Figure i, show ing the bag completed;

Figure 6 is a perspective view of the completed bag after the same hasbeen opened up;

Figure 7 is a bottom, plan view of the completed and opened bag; and

Figure 8 is a top, plan view of the completed and opened bag.

The bags of the type illustrated are made from a continuous paper tube1, the tube being creased and folded in the maner illustrated in Figure1,

4p and then severed into individual blanks, such as 2. Theillustratedbag is designed to be hexagonal, and hence the tube 1 issubdivided by creases into six lateral panels comprising front and backpanels 3 and 6, and side panels 4, 5, 4o 7 and 8, all of equal width.The side-panels t, 5, '7 and 8 are foded in between the front panel 3and the back panel 6 to form gussets 9, 10, 11 and 12, the gussets beingof about one-fourth the width of a panel. Thus, each of the side panelshas about one-half of its width disposed between the front and backpanels, and the other half protruding beyond the side boundary of theback panel, the total width of the blank, when folded as illustrated inFigure 1 and pressed out :3 fiat being substantially double the width ofa single panel. This width relationship is important for the reason thatby subsequent folding and pasting operations the width of the blank, asseen in Figure 1, is permanently fixed as the distance between oppositevertices of the hexagonal bottom of the bag when the same is final- 1ycompleted and opened. This distance is therefore equal to the diameterof a circle circumscribed about the bottom of the bag, and must besubstantially equal to double the length of a side of the base, if thebase is to form a substantially regular hexagon.

When a blank 2 has been severed from the continuous tube 1, the creasesalong the vertices of the gussets are slit for a short distance, theslits being designated 13 in Figure 2. These slits are all of equallength and desirably extend for a distance not greater than one quarterof the width of a panel. Afterthe slitting operation has been performed,the back panel 6 is held down, while the front panel 3 is folded back toa posi tion like that shown in Figure 3. This forms bottom panels 14-from the side panel material, each in the form of an isosceles righttiiangle 15 having a projecting rectangular flap or margin 16 extendingtoward the middle of the bag. It will be observed that the legs of thesetriangular panels extend only to the bottoms of the slits l3, and not tothe end edges of the front and rear 7 panels. The diagonal 1! of thefigure formed by the two triangular panels 14 and the space interveningbetween them forms a diagonal of the finished bag bottom. When thebottom panels have been formed as described, adhesive is smeared uponthe surfaces bounded by the lines a, a and b, b of Figure 3.

The left hand half of this figure, as seen in Figure 3, or in otherwords the halves of the panels 14 which are formed by the material ofthe front portion of the bag is now folded to the right, as seen inFigure 4, the crease being formed along a line 18 which extends parallelto line 1? and substantially midway between the line i? and the bases ofthe slits 13. To secure methernatical accuracy the line 18 should belocated at a distance from the line 1'7 equal to one half of the apothemof the hexagonal bottom of the finished and opened bag, or in otherwords at a distance equal to .4325 times the width of a lateral panel,but in practice considerable variation is permissible withoutobjectionably affecting the shape and utility of the finished bag. Thisfolding brings the left extremities of the panels 14, as seen in Figure3, nearly into registry with the center line 17, so that the blank takesthe form shown ill) in Figure 4. The front panel 3, however, has amarginal portion which extends a substantial distance beyond the centerline 17, this marginal portion being provided by reason of the provisionof the slits 13.

The right hand half of the figure formed by the panels 14 is nextsimilarly folded toward the left about a line 19, to a position likethat shown in Figure 5. The previously applied adhesive retains thefolded over portions in place so that the bag, as seen in Figure 5, isin a fiat condition and ready to be shipped for use.

It will be seen that the folded over portions 20 and 21 are unitedadhesively to both of the panels l l and are united adhesively to oneanother. The irregular hexagonal bottom disclosed in Figure 5 is,therefore, fixed in shape and has a longer diagonal of fixed length,such diagonal being equal to twice the width of a panel.

A bag constructed in the manner described may be unfolded to the formillustrated in Figures 6, 7 and 8 when it is to be used. A crease formedalong the line 1'7 of Figure 3 will fall at the periphery of the bottomof the unfolded bag along all sides thereof. When opening the bag thegussets are spread outwardly and disappear, serving in part to form thesmall triangular portions 22 of the bottom of the bag, and in part toform the sides of the bag.

The bag constructed as described is formed by substantially the sameseries of manipulative steps by which square bags of ihe satchel typeare formed, the chief point of difference consisting in the subdivisionof the bag material into six panels, and the formation of gussets ofappropriate depth fromthe side panel material prior to the formation ofthe bottom of the bag.

I have described what I believe to be the best embodiment of myinvention. I do not wish, however, to be confined to the embodimentsshown, but what I desire to cover by Letters Patent is set forth in theappended claims.

I claim: I i

1. The method of making a paper bag having a bottom in the form of aregular hexagon which comprises providing a tubular paper bag blanksubdivided by longitudinally extending creases to form front and backpanels and four side panels all of substantially equal width, withgussets formed of the side panel material lying between the front andback panels, drawing the front half of the bag at one end away from therear half throughout its entire width and folding it back to form fiatbottom panels of the side panel material with portions of the bottompanels protruding beyond the lateral bounds of the front and backpanels, and oppositely folding in end portions of the front and backhalves of the blank into overlapping relation and adhesively securingsuch end portions including gusset elements thereof to the bottom panelsand to one another.

2. The method of making a paper bag having a bottom in the form of aregular hexagon which comprises providing a tubular paper bag blanksubdivided by longitudinally extending creases to form front and backpanels and four side panels all of substantially equal width, withgussets formed of the side panel material lying between the front andback panels, slitting the creases at the vertices of the gussets inwardfor short distances from the bottom of the blank folding back the frontpanel to form bottompanels of the' side panel material with portions ofthe bottom panels protruding beyond the lateral bounds of the front andback panels, and folding in end portions of the blank into overlappingrelation and adhesively securing such end portions to the bottom panelsand to one another.

3. The method of making a. paper bag having a bottom in the form of aregular hexagon which comprises providing a tubular paper bag blanksubdivided by longitudinally extending creases to form front and backpanels and four side panels all of substantially equal width, withgussets formed of the side panel material lying between the front andback panels the gussets being of substantially one quarter panel width,slitting the creases at the vertices of the gussets inward for shortdistances from the bottom of the blank, folding back the front panel toform bottom panels of the side panel material with portions of thebottom panels protruding beyond the latteral bounds of the front andback panels, and folding in end portions of the blank into overlappingrelation and adhesively securing such end portions to the bottom panelsand to one another.

4. The method of making a paper bag having a bottom in the form of aregular hexagon which comprises providing a tubular paper bag blank,

subdividing the same by forming longitudinally extending creases, into afront panel, a back panel, and four side panels, all of substantiallyequal width, forming gussets between the front and back panels from theside panel material,

forming bottom panels of the side panel materialby drawing the fronthalf of the bag at one end away from the rear half throughout its entirewidth and folding it back with portions of the bottom panels protrudingbeyond the lateral bounds of the front and back panels, and oppositelyfolding in end portions of the blank and adhesively securing such endportions including gusset elements thereof to the bottom panels.

5. The method of making a paper bag having a bottom in the form of aregular hexagon which comprises providing a tubular paper bag blank,subdividing the same by forming longitudinally extending creases, into afront panel, a back panel, and four side panels, all of substantiallyequal width, forming gussets between the front and back panels from theside panel material of such width that the blank when flattened is ofdouble panel width, slitting the creases at the vertices of the gussetsinward for short distances from the bottom of the blank, folding backthe front panel to form bottom panels of the side panel material foldingin end portions of the blank along lines substantially equidistant fromthe center line of the bottom panels and separated from one another by adistance substantially equal to the apothem of the bottom of thefinished and unfolded bag, and adhesively securing such end portions tothe bottom panels and to one another, to seal the bottom of the bag andto fix the diagonal dimension in one direction and the apothem dimensionin another direction at right angles to the first at values appropriatefor the regular hexagonal base.

6. A paper bag comprising a body portion having a front panel, a backpanel, and four side panels, all of substantially the same width, and

having gussets formed in the side panels, and. a 4

hexagonal bottom folded into overlapping relation to the body portion ofthe bag with its long of a panel and its width substantially equalto'150 the apo'them of a regular hexagon having sides equal in length tothe width of a panel.

7. A paper bag comprising a body portion having a front panel, a backpanel and four side panels all of substantially the same width, andhaving gussets of quarter panel width formed in the side panels, and ahexagonal bottom folded into overlapping relation to the body portion ofthe bag with its long diagonal substantially in coincidence with thelower extremity of the body portion,- the bottom being of fixeddimensions and having its long diagonal fixed by pasting of front andback panel material and gusset material to side panel material to besubstantially twice as long as the width of a panel and its width fixedby pasting front and back panel material to one another to besubstantially equal to'the apcthem of a regular hexagon having sidesequal in length to the width of a panel.

8. A paper bag having a front panel, a back panel and-four side panelsall of substantially the same width, gussets of quarter panel widthformed in the side panels, and a bottom of regular hexagonal formcomposed of front, back and side panel material folded over and pastedtalk the length of a diagonal of the bottom and a dimension at rightangles thereto while leaving the side panel material including thegusset material free to be folded out to make the bottom of the openedbag of regular hexagonal form, the

front and rear terminal portions of the bottom being folded inwardagainst the central portion of the bottom and into substantially meetingrelation, and the folded bottom lying against'one side of thebag body inpartially overlapping relation thereto.

9. A paper bag having a front panel, a back panel and four side panelsall of substantially the same width. gussets formed in the side panelsof such depths that the side panels protrude for about half panel widthbeyond the lateral bounds of the front and back panels, and a bottomcomposed of bottom panels formed of side panel material which connectsseparated end portions of the front and back panels, and of saidseparated end portions of the bag material folded in from oppositedirections upon the bottom panels and secured to them.

- THEODORE S. FALK.

